Frontier LLM API prices shifted three times in August after five months of no change
After five months of complete price stability across ten flagship large language model APIs, August 2025 saw three pricing changes in under three weeks. DeepSeek raised its V4 Pro rates by roughly 264%, tripling the blended price and introducing a peak/off-peak schedule without notifying customers by email. Alibaba's Qwen model slot saw a modest price reduction, while OpenAI cut GPT-5.6 Sol prices by 29%, though the cut was labelled promotional and guaranteed only until November 2026. Despite the DeepSeek spike, the equal-weight index of ten flagship models ended August 5.7% lower, largely due to the OpenAI cut. The changes signal a shift from the previously rigid pricing pattern, with two of ten flagship models now publishing list prices that represent the top of a variable range rather than a fixed rate.
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